Changed __config to react to all of clang's currently documented has_feature flags, and renamed _LIBCPP_MOVE to _LIBCPP_HAS_NO_RVALUE_REFERENCES to be more consistent with the rest of the libc++'s flags, and with clang's nomenclature.

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@113086 91177308-0d34-0410-b5e6-96231b3b80d8

include/regex

@@ -5185,10 +5185,8 @@ public:
     explicit match_results(const allocator_type& __a = allocator_type());
 //    match_results(const match_results&) = default;
 //    match_results& operator=(const match_results&) = default;
-#ifdef _LIBCPP_MOVE
 //    match_results(match_results&& __m) = default;
 //    match_results& operator=(match_results&& __m) = default;
-#endif  // _LIBCPP_MOVE
 //    ~match_results() = default;
 
     // size: